Zircon U-Pb Age, Hf Isotope Character of the Hercynian Granite in the Eastern Jilin Province and the Crustal Growth
详细信息
- 责任者：Liu Shen (State Key Laboratory of Continental dynamics ; Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Feng Caixia
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(11)
- 关键词：花岗岩 ; granite ; 吉林 ; Jilin Province
- 页码：p.3715-3720
- 图表：3 illus., 2 tables, 43 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Zircon U-Pb dating by LA-ICPMS technique indicates that the studied granitic pluton was emplaced during Late Paleozoic （Hercynian） with a weighted age of (262.2±1.2) Ma. Meanwhile, zircon Hf analyses conducted by LA-MC-ICPMS show that this pluton has variational εHf（262 Ma） values from 1.35 to 5.62, indicating that the primary magma of the granites mainly resulted from a depleted asthenospheric mantle. In addition, the Hf two-stage modal ages change from 1 091 Ma to 1 357 Ma, suggesting an important crustal growth event beneath the studied area.